pipe clay


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pipe clay

[′pīp ‚klā]
(geology)
A mass of fine clay, usually lens-shaped, which forms the surface of bedrock and upon which often rests the gravel of old river beds.
References in periodicals archive ?
THE lady in Australia who can't remember what stair-whitening was called must mean a cake of pipe clay, a solid block of whitener which was broken up and dissolved in a bucket of boiling water.
The pipe clay caricature model was discovered in a well deposit in Penllyn, known as Salmon Wells or Ffynnon y Pentre, in 1999.
Hepworth Building Products Ltd, variation of conditions for stripping soil for development and the deposition of soil during restoration of the site on previous permission to extract pipe clay, access, landscape and reinstate Ox Lee Quarry, north of Bedding Edge Road, Penistone Road, Hepworth.